An R Autograding Extension for Otter-Grader

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Documentation for package ‘ottr’ version 1.1.4

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check Execute checks in a test suite and return the 'TestFileResult' object from executing the test. Optionally prints results of the test to console.
execute_script Execute a string as an R script and return the environment from that execution.
export Export a Jupyter Notebook to a zip file for submission.
grade_script Execute a script, parse check outputs, and run additional tests specified by the glob pattern 'tests_glob' on the test environment.
load_test_cases Loads test case data from a test file. Executes the file and grabs the global 'test' variable, which should be a 'list'.
make_secret Randomly generate a string of 'n_chars' sampled at random from 'valid_chars'.
results_to_json Export a list of 'TestFileResult' objects to a JSON string
results_to_list Convert a list of 'TestFileResult' objects to a JSON-like object of the correct form for writing results for Gradescope.
run_autograder Run autograder in a Gradescope container and return the results as a properly-formatted JSON string
TestCase A test case for Ottr. Contains configurations and code to be executed for the test.
TestCaseResult A utility class for tracking the results of a 'TestCase'
TestFileResult A collection of test case results that correspond to a single test file
update_ast_check_calls Traverse an AST (a list of expressions) and change calls of the form '. = ottr::check(...)' so that they are appended to a list with name 'list_name'.
VALID_EXPR_CHARS A string containing characters that can be made into a valid variable name. Does not include any digits because randomly sampling with them included could result in an invalid variable name.
valid_syntax Determine whether a code snippet has any syntax errors.